Universität zu Köln

Brune, Veronika, Hegemann, Corinna and Mathur, Sanjay ORCID: 0000-0003-2765-2693 (2019). Molecular Routes to Two-Dimensional Metal Dichalcogenides MX2 (M = Mo, W; X = S, Se). Inorg. Chem., 58 (15). S. 9922 - 9935. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-510X

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Abstract

New synthetic access to two-dimensional trapsition metal dichalcogenides (TMDCs) is highly desired to exploit their extraordinary semiconducting and optoelectronic properties for practical applications. We introduce here an entirely novel class of molecular precursors, [M-IV (XEtN(Me)- Etx)(2)] (M-IV= mo(IV),W-IV,X =S, Se), enabling chemical vapor deposition of TMDC thin films. Molybdenum and tungsten complexes of dianionic tridentate pincer-type ligands (HXEt)(2)NR (R = methyl, tert-butyl, phenyl) produced air-stable monomeric dichalcogenide complexes, [W(SEtN(Me)EtS)(2)] and [Mo(SEtN(Me)EtS)(2)], displaying W and Mo centers in an octahedral environment of 4 S and 2 N donor atoms. Owing to their remarkable volatility and clean thermal decomposition, both Mo and W complexes, when used in the chemical vapor deposition (CVD) process, produced crystalline MoS2 and WS2 thin films. X-ray diffraction analysis and atomic-scale imaging confirmed the phase purity and 2D structural characteristics of MoS2 and WS2 films. The new set of ligands presented in this work open ups convenient access to a scalable and precursor-based synthesis of 2D transition metal dichalcogenides.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Brune, Veronika UNSPECIFIED UNSPECIFIED UNSPECIFIED Hegemann, Corinna UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED orcid.org/0000-0003-2765-2693 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-144788
DOI:	10.1021/acs.inorgchem.9601084
Journal or Publication Title:	Inorg. Chem.
Volume:	58
Number:	15
Page Range:	S. 9922 - 9935
Date:	2019
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1520-510X
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TUNGSTEN DISULFIDE NANOSHEETS; CHEMICAL-VAPOR-DEPOSITION; STABILIZED TIN(II) COMPOUNDS; SINGLE-SOURCE PRECURSOR; ANODE MATERIALS; OXORHENIUM(V) COMPLEXES; TRIPLE BOND; WAFER-SCALE; LAYER; MOLYBDENUM Multiple languages Chemistry, Inorganic & Nuclear Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14478